Arm, which reports shipment figures three months in arrears, said its clients sold 110m chips using its designs in the fourth quarter of last year, an increase of 15% on the previous quarter. However, this translated into a 6% decline in royalty revenues to £6.4m versus the previous three months. That was below analysts' expectations of a 3% rise in royalties. As a percentage of total group revenue, royalties declined to 15% of sales.